html,body{
    width: 100%;
}
*{
    padding: 0;
    margin: 0;
}
a{
    text-decoration: none;
}
li{
    list-style: none;
}
/*兼容各浏览器清除浮动产生的影响*/
.clearFloat:after{
    content: "";
    display: block;
    visibility: hidden;
    height: 0;
    clear: both;
}
.clearFloat{
    zoom: 1;
}
